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6.5 Trouble check list
Table 5 Trouble check list
Problem Cause Measures Reference
① The pump is not connected to the
power supply.
① Connect the pump to the power
supply.
3.4
② The power switch is not turned on. ② Turn on the power switch. 4.2
③ Problem with power supply voltage ③ Set the power supply voltage to
within ±10% of the rated voltage.
3.5
④ The overload protector has
actuated.
④Disconnect the plug and push
the reset button.
Press the reset button.
4.6
⑤ The motor malfunctions. ⑤ Replace the motor.
⑥ Low ambient temperature has
increased the oil viscosity.
⑥ Increase the ambient temperature to
7℃ or more.
4.4
⑦ The entrance of foreign matter into
the pump caused the rotor to burn
out.
⑦ Overhaul (replace the cylinder and
rotor).
6.2
⑧ Moisture or solvents were sucked
in, forming rust inside the pump.
⑧ Overhaul (replace the cylinder and
rotor).
6.2
⑨ Reaction product accumulated in
the pump when the pump stops
after exhausting reactive gas.
⑨ Overhaul (clean the pump inside
and remove reaction products).
The pump
does not rotate.
⑩Components inside the pump have
burnt out.
⑩ Overhaul (replace the damaged
components).
① Problem with power supply voltage ① Set the power supply voltage to
within ±10% of the rated voltage.
3.5
② Defective wiring to the pump ② Perform wiring to the pump again. 3.4
③ Low ambient temperature has
increased the oil viscosity.
③ Increase the ambient temperature to
7℃ or more.
4.4
The pump’s
rotation is
unstable.
④ Foreign matter has entered the
pump.
④ Disassemble and clean the pump to
eliminate foreign matter.
① The pump is too small for the
volume of the vacuum chamber.
① Select another pump. 5.2
② The pressure measurement method
is not correct.
② Measure the pressure correctly. 5.1
③ The vacuum gauge is not suitable. ③ Measure with a calibrated vacuum
gauge suitable for the pressure
range.
④ The pipe connected to the inlet port
is small, or the piping distance is
long.
④ Use pipes having a diameter larger
than the inlet port diameter, or
reduce the distance from the
vacuum chamber.
5.1
The pressure
does not
decrease.
⑤ The wire mesh at the inlet port is
clogged.
⑤Remove the piping from the upper
section of the inlet port, and clean
the wire mesh.
6.2
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